Tested today at 285w (NP ~290, AP 280). Looking at linear and log trend looks like a stretch of 320w for Marmotte and a possible of 310w.
Mad. Mad. Mad.
Only time will tell, but my new approach of higher intensity training and no L2 seems to be paying off in terms of FTP. Given I also set a fast time for the ToSH with no long rides suggests that L2 is highly over-rated.